US12331185B2 - Thermoplastic resin composition and molded article including the same - Google Patents

Thermoplastic resin composition and molded article including the same Download PDF

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US12331185B2
US12331185B2 US17/760,994 US202117760994A US12331185B2 US 12331185 B2 US12331185 B2 US 12331185B2 US 202117760994 A US202117760994 A US 202117760994A US 12331185 B2 US12331185 B2 US 12331185B2
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thermoplastic resin
weight
resin composition
compound
copolymer
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US20220363888A1 (en
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Wangrae JOE
Daeun SUNG
Tae Hoon Kim
Chun Ho Park
Yong Hee An
Jeongmin JANG
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LG Chem Ltd
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LG Chem Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/12—Copolymers of styrene with unsaturated nitriles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/18—Spheres

Definitions

  • the present invention relates to a thermoplastic resin composition and a molded article including the same. More particularly, the present invention relates to a thermoplastic resin composition that has excellent processability at a low temperature of less than 200° C. compared to conventional ASA resins and thus has no surface defects, such as flow marks or peeling, during co-extrusion with a PVC resin; enables low energy consumption; has excellent processing stability due to a small change in viscosity even with a change in extrusion RPM; and has excellent heat resistance, and a molded article including the thermoplastic resin composition.
  • ASA resins Acrylonitrile-styrene-acrylate copolymers
  • ASA resins have good weather resistance, aging resistance, chemical resistance, rigidity, impact resistance, and processability, and are widely used in various fields such as automobiles, miscellaneous goods, and construction materials due to broad applicability thereof.
  • ASA resins are widely used for PVC co-extrusion, and specific uses thereof include window profiles, deck boards, roofing, siding, and the like.
  • extrusion or injection processing is generally performed at a processing temperature of 200 to 240° C.
  • a PVC resin there is a limitation in that the PVC resin must be co-extruded at a low temperature of less than 200° C. due to the problem that the PVC resin is easily carbonized at a high temperature of 200° C. or higher.
  • the viscosity of an ASA resin rapidly increases at a low temperature of less than 200° C., a PVC resin layer is not properly covered with an ASA resin layer when the ASA resin is co-extruded with a PVC resin, causing surface defects such as generation of flow marks and peeling (not partially covered with the ASA resin).
  • the viscosity of an ASA resin rapidly changes according to change in the RPM of an extruder, and a processing window is narrow.
  • the present invention has been made in view of the above problems, and it is one object of the present invention to provide a thermoplastic resin composition that has excellent processability at a low temperature of less than 200° C. compared to conventional ASA resins and thus has no surface defects, such as flow marks or peeling, during co-extrusion with a PVC resin; enables low energy consumption; has excellent processing stability due to little change in viscosity despite a change in extrusion RPM; and has excellent heat resistance, and a molded article including the thermoplastic resin composition.
  • thermoplastic resin composition including 10 to 70% by weight of a graft copolymer (A) including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 50 to 150 nm and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 300 to 600 nm; and 30 to 90% by weight of a non-grafted copolymer (B) including a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of 160,000 to 200,000 g/mol and a low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) having a weight average molecular weight of 80,000 g/mol or more and less than 160,000 g/mol
  • thermoplastic resin composition including 10 to 70% by weight of a graft copolymer (A) including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 50 to 150 nm and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 300 to 600 nm; and 30 to 90% by weight of a non-grafted copolymer (B) including a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of 160,000 to 200,000 g/mol and a low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) having a weight average molecular weight of 80,000 g/mol or more and less than 160,000 g/mol
  • thermoplastic resin composition including 100 parts by weight of a base resin including 10 to 70% by weight of a graft copolymer (A) including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 50 to 150 nm and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 300 to 600 nm; and 30 to 90% by weight of a non-grafted copolymer (B) including a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of 160,000 to 200,000 g/mol and a low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) having a weight average molecular weight of 80,000 g/mol
  • the thermoplastic resin composition may not include a thermoplastic resin having a glass transition temperature of 125° C. or higher.
  • thermoplastic resin composition of the present invention in accordance with yet another aspect of the present invention, provided is a molded article including the thermoplastic resin composition of the present invention.
  • the present invention can provide a thermoplastic resin composition that has excellent processability at a low temperature of less than 200° C. compared to conventional ASA resins and thus has no surface defects, such as flow marks or peeling, during co-extrusion with a PVC resin; enables low energy consumption; has excellent processing stability due to little change in viscosity even despite a change in extrusion RPM; and has excellent heat resistance, and a molded article including the thermoplastic resin composition.
  • FIG. 1 schematically shows the definition, calculation method, and meaning of skewness (Rsk) according to the present invention.
  • the skewness (Rsk) is defined as a characteristic value representing the direction and degree of asymmetry with respect to an average value in the histogram of a statistical group, and through the skewness (Rsk), it is possible to evaluate which of peaks and valleys forms most of a surface.
  • Rq root mean square deviation
  • Z denotes the height of a peak
  • k denotes an average section length (sampling length).
  • thermoplastic resin composition and a molded article including the same according to the present invention will be described in detail.
  • the present inventors confirmed that, when two types of acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymers each containing rubber particles having different average particle diameters were mixed in a predetermined ratio, a predetermined high molecular weight aromatic vinyl polymer excluding a heat-resistant aromatic vinyl polymer and a predetermined low molecular weight aromatic vinyl polymer were added thereto within a predetermined content range, and the pressure gradient or discharge rate of a thermoplastic resin composition applied to an extruder was adjusted to a predetermined value, no surface defects, such as flow marks or peeling, occurred at a low temperature of less than 200° C. even during co-extrusion with a PVC resin, energy consumption was reduced, and heat resistance was excellent. Based on these results, the present inventors conducted further studies to complete the present invention.
  • the thermoplastic resin composition of the present invention includes 10 to 70% by weight of a graft copolymer (A) including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 50 to 150 nm and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 300 to 600 nm; and 30 to 90% by weight of a non-grafted copolymer (B) including a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of 160,000 to 200,000 g/mol and a low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) having a weight average molecular weight of 80,000 g/mol or more and less than 160,000 g/mol.
  • A graft copo
  • the pressure gradient of the thermoplastic resin composition applied to a single screw extruder for sheet molding is 130 or less.
  • the present invention has an advantage of providing a thermoplastic resin composition that has excellent processability at a low temperature of less than 200° C. compared to conventional ASA resins and thus has no surface defects, such as flow marks or peeling, during co-extrusion with a PVC resin; has excellent economics due to low energy consumption and a low content of an ASA resin; and has excellent heat resistance, and a molded article including the thermoplastic resin composition.
  • thermoplastic resin composition of the present invention includes 10 to 70% by weight of a graft copolymer (A) including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 50 to 150 nm and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 300 to 600 nm; and 30 to 90% by weight of a non-grafted copolymer (B) including a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of 160,000 to 200,000 g/mol and a low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) having a weight average molecular weight of 80,000 g/mol or more and less than 160,000 g/mol.
  • thermoplastic resin composition when the thermoplastic resin composition is discharged through a T-die for 1 minute and 30 seconds under conditions of a barrel temperature of 190° C., a die temperature of 200° C., and an extrusion RPM of 50, a discharge rate calculated based on the discharge amount of the thermoplastic resin composition is 18 g/min or more.
  • processability is excellent at a low temperature of less than 200° C., and thus no surface defects, such as flow marks or peeling, occur even during co-extrusion with a PVC resin.
  • energy consumption is reduced.
  • a PVC resin may be effectively covered without significant change in viscosity in a wide processing window.
  • heat resistance is excellent.
  • thermoplastic resin composition of the present invention includes 100 parts by weight of a base resin including 10 to 70% by weight of a graft copolymer (A) including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 50 to 150 nm and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 300 to 600 nm; and 30 to 90% by weight of a non-grafted copolymer (B) including a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of 160,000 to 200,000 g/mol and a low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) having a weight average molecular weight of 80,000 g/mol or more and less than 160,000
  • thermoplastic resin composition of the present invention compared to a conventional ASA resin
  • processability is excellent at a low temperature of less than 200° C., and thus no surface defects, such as flow marks or peeling, occur even during co-extrusion with a PVC resin.
  • a PVC resin may be effectively covered without significant change in viscosity in a wide processing window.
  • heat resistance is excellent.
  • molding temperature means the highest temperature among temperatures set in the temperature control zone of a barrel in an extrusion or injection device (or extrusion or injection process). In general, molding temperature refers to the temperature of a zone adjacent to a die in a barrel.
  • barrel temperature means molding temperature
  • a barrel part means a zone, the temperature of which is directly controlled by a heating device in a barrel.
  • a barrel part consists of a plurality of temperature control zones without being limited thereto. The temperature of the barrel part is sequentially set from a temperature control zone or the first temperature control zone adjacent to an inlet (hopper) for injecting a thermoplastic resin composition to a temperature control zone or the last temperature control zone adjacent to a die.
  • die temperature means temperature set in a die nozzle, i.e., the temperature of a die nozzle during extrusion or injection
  • a die part means a zone, the temperature of which is directly controlled by a heat device in a die.
  • a die part consists of a plurality of temperature control zones without being limited thereto. The temperature of the die part is sequentially set from a temperature control zone or the first temperature control zone adjacent to a barrel to the last temperature control zone or a nozzle adjacent to a die.
  • thermoplastic resin composition of the present invention will be described in detail.
  • the acrylate rubber of the graft copolymer (A-1) may have an average particle diameter of 50 to 150 nm, preferably 50 to 130 nm, more preferably 100 to 130 nm. Within this range, a finally prepared thermoplastic resin composition may have excellent impact strength and appearance.
  • average particle diameter may be measured by dynamic light scattering, and specifically, may be measured as an intensity value using a Nicomp 380 particle size analyzer (manufacturer: PSS) in a Gaussian mode.
  • PSS Nicomp 380 particle size analyzer
  • a sample is prepared by diluting 0.1 g of latex (TSC: 35 to 50 wt %) 1,000 to 5,000 times with distilled water, i.e., a sample is diluted appropriately so as not to deviate significantly from an intensity setpoint of 300 kHz and is placed in a glass tube.
  • the average particle diameter of the sample is measured using a flow cell in auto-dilution in a measurement mode of dynamic light scattering/intensity 300 kHz/intensity-weight Gaussian analysis.
  • setting values are as follows: temperature: 23° C.; measurement wavelength: 632.8 nm; and channel width: 10 psec.
  • the graft copolymer (A-1) may be included in an amount of 5 to 30% by weight, preferably 10 to 25% by weight, more preferably 10 to 20% by weight. Within this range, processability may be excellent during co-extrusion, and mechanical properties such as impact strength, tensile strength, and elongation, appearance, and surface hardness may be excellent.
  • the graft copolymer (A-1) may include to 60% by weight of acrylate rubber, 20 to 40% by weight of an aromatic vinyl compound, and 10 to 20% by weight of a vinyl cyanide compound. Within this range, appearance and surface hardness may be excellent.
  • the graft copolymer (A-1) may include 45 to 55% by weight of acrylate rubber, 30 to 40% by weight of an aromatic vinyl compound, and 10 to 20% by weight of a vinyl cyanide compound. Within this range, appearance and surface hardness may be excellent.
  • a polymer including a certain compound means a polymer prepared by polymerizing the compound, and a unit in the polymer is derived from the compound.
  • the graft copolymer (A-1) may be prepared by emulsion polymerization. In this case, appearance and surface hardness may be excellent.
  • the acrylate constituting acrylate rubber may include one or more selected from the group consisting of alkyl acrylates containing an alkyl group having 2 to 8 carbon atoms, preferably an alkyl acrylate containing an alkyl group having 4 to 8 carbon atoms, more preferably butyl acrylate or ethylhexyl acrylate.
  • the aromatic vinyl compound may include one or more selected from the group consisting of styrene, ⁇ -methylstyrene, m-methylstyrene, p-methylstyrene, and p-tert-butylstyrene, preferably styrene.
  • Emulsion graft polymerization methods commonly practiced in the art to which the present invention pertains may be used as the emulsion polymerization method of the present invention without particular limitation.
  • the acrylate rubber of the graft copolymer (A-2) may have an average particle diameter of 300 to 600 nm, preferably 350 to 600 nm, more preferably 350 to 550 nm. Within this range, mechanical properties such as tensile strength, elongation, and impact strength may be excellent.
  • the graft copolymer (A-2) may be included in an amount of 15 to 35% by weight, preferably 20 to 30% by weight, more preferably 20 to 25% by weight.
  • processability may be excellent during co-extrusion, and mechanical properties such as impact strength, tensile strength, and elongation, appearance, and surface hardness may be excellent.
  • the graft copolymer (A-2) may include 40 to 60% by weight of acrylate rubber, 25 to 45% by weight of an aromatic vinyl compound, and 10 to 20% by weight of a vinyl cyanide compound. Within this range, mechanical properties such as tensile strength, elongation, and impact strength may be excellent.
  • the graft copolymer (A-1) may include 45 to 55% by weight of acrylate rubber, 30 to 40% by weight of an aromatic vinyl compound, and 10 to 20% by weight of a vinyl cyanide compound. Within this range, mechanical properties such as tensile strength, elongation, and impact strength may be excellent.
  • the graft copolymer (A-2) may be prepared by emulsion polymerization.
  • mechanical properties such as tensile strength, elongation, and impact strength may be excellent.
  • Emulsion graft polymerization methods commonly practiced in the art to which the present invention pertains may be used as the emulsion polymerization method of the present invention without particular limitation.
  • the acrylate constituting acrylate rubber may include one or more selected from the group consisting of alkyl acrylates containing an alkyl group having 2 to 8 carbon atoms, preferably an alkyl acrylate containing an alkyl group having 4 to 8 carbon atoms, more preferably butyl acrylate or ethylhexyl acrylate.
  • the aromatic vinyl compound may include one or more selected from the group consisting of styrene, ⁇ -methylstyrene, m-methylstyrene, p-methylstyrene, and p-tert-butylstyrene, preferably styrene.
  • the vinyl cyanide compound may include one or more selected from the group consisting of acrylonitrile, methacrylonitrile, ethylacrylonitrile, and isopropylacrylonitrile, preferably acrylonitrile.
  • the sum of the weights of the graft copolymer (A-1) and the graft copolymer (A-2) may be 10 to 70% by weight, preferably 20 to 50% by weight, more preferably 30 to 40% by weight. Within this range, low-temperature processability may be excellent, and thus appearance may be excellent.
  • the amount of the graft copolymer (A-1) is preferably less than that of the graft copolymer (A-2).
  • the weight ratio of the graft copolymer (A-1) to the graft copolymer (A-2) is preferably 1:1.2 to 1:2.5, more preferably 1:1.4 to 1:2.5, still more preferably 1:1.5 to 1:2. Within this range, low-temperature processability may be excellent, and thus appearance may be excellent.
  • the weight ratio of A to B refers to the weight ratio of A:B.
  • the high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) of the present invention is preferably an aromatic vinyl compound-vinyl cyanide compound copolymer having a weight average molecular weight of 160,000 to 200,000 g/mol, more preferably an aromatic vinyl compound-vinyl cyanide compound copolymer having a weight average molecular weight of 160,000 to 190,000 g/mol, still more preferably an aromatic vinyl compound-vinyl cyanide compound copolymer having a weight average molecular weight of 160,000 to 180,000 g/mol, still more preferably an aromatic vinyl compound-vinyl cyanide compound copolymer having a weight average molecular weight of 160,000 to 170,000 g/mol.
  • mechanical strength such as impact strength, and heat resistance may be excellent.
  • the high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) is preferably included in an amount of 20 to 55% by weight, more preferably 25 to 50% by weight. In this case, heat resistance may be excellent without deterioration in low-temperature processability.
  • weight average molecular weight may be measured using tetrahydrofuran (THF) as an eluate through gel permeation chromatography (GPC, Waters Breeze). In this case, weight average molecular weight is obtained as a relative value to a polystyrene standard (PS) specimen.
  • THF tetrahydrofuran
  • GPC gel permeation chromatography
  • Specific measurement conditions are as follows: solvent: THF, column temperature: 40° C., flow rate: 0.3 ml/min, sample concentration: 20 mg/ml, injection amount: 5 ⁇ l, column model: 1 ⁇ PLgel 10 ⁇ m MiniMix-B (250 ⁇ 4.6 mm)+1 ⁇ PLgel 10 ⁇ m MiniMix-B (250 ⁇ 4.6 mm)+1 ⁇ PLgel 10 ⁇ m MiniMix-B Guard (50 ⁇ 4.6 mm), equipment name: Agilent 1200 series system, refractive index detector: Agilent G1362 RID, RI temperature: 35° C., data processing: Agilent ChemStation S/W, and test method (Mn, Mw and PDI): OECD TG 118.
  • the high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) may include 65 to 80% by weight of an aromatic vinyl compound and 20 to 35% by weight of a vinyl cyanide compound, preferably 67 to 80% by weight of an aromatic vinyl compound and 20 to 33% by weight of a vinyl cyanide compound, more preferably 70 to 75% by weight of an aromatic vinyl compound and 25 to 30% by weight of a vinyl cyanide compound.
  • mechanical strength and low-temperature processability may be excellent.
  • the aromatic vinyl compound may include one or more selected from the group consisting of styrene, ⁇ -methylstyrene, m-methylstyrene, p-methylstyrene, and p-tert-butylstyrene, preferably styrene.
  • the vinyl cyanide compound may include one or more selected from the group consisting of acrylonitrile, methacrylonitrile, ethylacrylonitrile, and isopropylacrylonitrile, preferably acrylonitrile.
  • the high molecular weight aromatic vinyl polymer (B-1) may be prepared by suspension polymerization, emulsion polymerization, solution polymerization, or bulk polymerization, preferably bulk polymerization. In this case, heat resistance and fluidity may be excellent.
  • Suspension polymerization, emulsion polymerization, solution polymerization, and bulk polymerization commonly practiced in the art to which the present invention pertains may be used in the present invention without particular limitation.
  • the low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) of the present invention may be an aromatic vinyl compound-vinyl cyanide compound copolymer having a weight average molecular weight of greater than 80,000 g/mol and less than 160,000 g/mol, and preferably includes one or more selected from the group consisting of an aromatic vinyl compound-vinyl cyanide compound copolymer (B-2a) having a weight average molecular weight of 80,000 to 110,000 g/mol, and an aromatic vinyl compound-vinyl cyanide compound copolymer (B-2c) having a weight average molecular weight of greater than 110,000 g/mol and less than 160,000 g/mol, more preferably an aromatic vinyl compound-vinyl cyanide compound copolymer (B-2a) having a weight average molecular weight of 80,000 to 110,000 g/mol or an aromatic vinyl compound-vinyl cyanide compound copolymer (B-2c) having a weight average molecular weight
  • the low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) is preferably included in an amount of 5 to 30% by weight, more preferably 5 to 35% by weight. Within this range, chemical resistance, impact strength, tensile strength, and low-temperature processability may be excellent.
  • the aromatic vinyl compound-vinyl cyanide compound copolymer (B-2a) is preferably included in an amount of 10 to 30% by weight, more preferably 10 to 25% by weight, still more preferably to 20% by weight. Within this range, chemical resistance, impact strength, tensile strength, and low-temperature processability may be excellent.
  • the aromatic vinyl compound-vinyl cyanide compound copolymer (B-2b) is preferably included in amount of 10 to 30% by weight, more preferably 10 to 25% by weight, still more preferably 10 to 20% by weight. Within this range, chemical resistance, impact strength, tensile strength, and low-temperature processability may be excellent.
  • the aromatic vinyl compound-vinyl cyanide compound copolymer (B-2c) is preferably included in an amount of 10 to 40% by weight, more preferably 20 to 40% by weight, still more preferably 20 to 35% by weight. Within this range, chemical resistance, impact strength, tensile strength, and low-temperature processability may be excellent.
  • the low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) preferably includes 65 to 80% by weight of an aromatic vinyl compound and 20 to 35% by weight of a vinyl cyanide compound, more preferably 67 to 80% by weight of an aromatic vinyl compound and 20 to % by weight of a vinyl cyanide compound, still more preferably 70 to 75% by weight of an aromatic vinyl compound and 25 to 30% by weight of a vinyl cyanide compound. Within this range, chemical resistance, impact strength, tensile strength, and processability may be excellent.
  • the aromatic vinyl compound may include one or more selected from the group consisting of styrene, m-methylstyrene, p-methylstyrene, and p-tert-butylstyrene, preferably styrene.
  • the vinyl cyanide compound may include one or more selected from the group consisting of acrylonitrile, methacrylonitrile, ethylacrylonitrile, and isopropylacrylonitrile, preferably acrylonitrile.
  • the low molecular weight aromatic vinyl polymer (B-2) may be prepared by suspension polymerization, emulsion polymerization, solution polymerization, or bulk polymerization, preferably bulk polymerization. In this case, heat resistance and fluidity may be excellent.
  • Suspension polymerization, emulsion polymerization, solution polymerization, and bulk polymerization commonly practiced in the art to which the present invention pertains may be used in the present invention without particular limitation.
  • the non-grafted copolymer (B) is preferably included in an amount of 30 to 90% by weight, more preferably 40 to 80% by weight, still more preferably 50 to 70% by weight, still more preferably 50 to 60% by weight. Within this range, low-temperature processability and heat resistance may be excellent.
  • the polyamide resin of the present invention is preferably included in an amount of 0.1 to 10 parts by weight, more preferably 1 to 10 parts by weight, still more preferably 3 to 9 parts by weight, most preferably 4 to 7 parts by weight. Within this range, matte properties may be excellent while maintaining mechanical properties and low-temperature processability.
  • the polyamide resin preferably has a relative viscosity (96% sulfuric acid solution) of 2.5 or less, as a specific example, 2.0 to 2.5, as a preferred example, 2.2 to 2.5. Within this range, matte properties may be excellent while maintaining mechanical properties, weather resistance, and processability.
  • relative viscosity may be measured using an Ubbelohde viscometer by the ISO 307 sulfuric acid method. Specifically, 1 g of a specimen to be measured is dissolved in 100 ml of an aqueous sulfuric acid solution having a concentration of 96% by weight to prepare a solution, and relative viscosity is measured at 20° C. using the solution and using a Brookfield rotational viscometer.
  • the polyamide resin may include one or more selected from the group consisting of polyamide 6, polyamide 66 (PA 6.6), polyamide 46, polyamide LL, polyamide 12, polyamide 610, polyamide 612, polyamide 6/66, polyamide 6/612, polyamide MXD6, polyamide 6/MXD6, polyamide 66/MXD6, polyamide 6T, polyamide 6I, polyamide 6/6T, polyamide 6/6I, polyamide 66/6T, polyamide 66/6I, polyamide 6/6T/6I, polyamide 66/6T/6I, polyamide 9T, polyamide 9I, polyamide 6/9T, polyamide 6/9I, polyamide 66/9T, polyamide 6/12/9T, polyamide 66/12/9T, polyamide 6/12/9I, and polyamide 66/12/6I, preferably one or more selected from the group consisting of polyamide 6, polyamide 12, and polyamide 66, more preferably polyamide 66.
  • matte properties may be excellent while maintaining mechanical properties
  • Polymerization methods commonly practiced in the art to which the present invention pertains may be used as a method of preparing the polyamide resin without particular limitation, and commercially available polyamides may also be used when the commercially available polyamides follow the definition of the polyamide according to the invention.
  • the inorganic pigment of the present invention is preferably included in an amount of 0.1 to 5 parts by weight, more preferably 0.1 to 2 parts by weight, still more preferably 0.1 to 1 part by weight, still more preferably 0.3 to 0.8 parts by weight. Within this range, weather resistance and hiding power may be excellent.
  • the inorganic pigment may include one or more selected from the group consisting of metal compounds including Ti, Pb, Fe, Cr, etc and carbon black.
  • the metal compounds are preferably metal oxides or metal hydroxides.
  • the inorganic pigment may include one or more selected from the group consisting of TiO 2 and zinc oxide as white inorganic pigments; carbon black and graphite as black inorganic pigments; IOR, cadmium red, and red lead (Pb 3 O 4 ) as red inorganic pigments; chrome yellow, zinc chromate, and cadmium yellow as yellow inorganic pigments; and chrome green and zinc green as green inorganic pigments, and most preferably, is TiO 2 , which is a white inorganic pigment.
  • thermoplastic resin composition of the present invention preferably includes a lubricant, an antioxidant, and a UV stabilizer.
  • the lubricant is preferably included in an amount of 0.1 to 3 parts by weight, more preferably 0.3 to 1 part by weight, still more preferably 0.3 to 0.8 parts by weight. Within this range, a surface having a rough feeling may be implemented, and impact strength and fluidity may be excellent.
  • the lubricant may include one or more selected from the group consisting of an ester-based lubricant, a metal salt-based lubricant, a carboxylic acid-based lubricant, a hydrocarbon-based lubricant, and an amide-based lubricant, preferably an amide-based lubricant, more preferably a stearamide-based lubricant, most preferably alkylene bis(stearamide) containing alkylene having 1 to 10 carbon atoms.
  • a surface having a rough feeling may be implemented, and impact strength and fluidity may be excellent.
  • the stearamide-based lubricant may include stearamide and a stearamide substituent in which one or more hydrogens thereof are substituted with other substituents.
  • Ester-based lubricants, metal salt-based lubricants, carboxylic acid-based lubricants, hydrocarbon-based lubricants, and amide-based lubricants commonly used in the art may be used in the present invention without particular limitation.
  • the antioxidant preferably includes one or more selected from the group consisting of a phenolic antioxidant and a phosphorus antioxidant, more preferably a mixture of a phenol-based antioxidant and a phosphorus-based antioxidant.
  • each of the phenolic antioxidant and the phosphorus antioxidant is preferably included in an amount of 0.1 to 2 parts by weight, more preferably 0.1 to 1 part by weight, still more preferably 0.2 to 0.6 parts by weight. Within this range, a surface having a rough feeling may be implemented, and an antioxidative effect may be excellent.
  • the phenol-based antioxidant preferably includes one or more selected from tetrakis[ethylene-3-(3,5-di-t-butyl-hydroxyphenyl)propionate] (IR-1010), octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate (IR-1076), pentaerythritol tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], and 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzil)benzene, more preferably octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate (IR-1076).
  • IR-1076 tetrakis[ethylene-3-(3,5-di-t-butyl-hydroxyphenyl)propionate]
  • IR-1076 octa
  • the phosphorus-based antioxidant preferably includes one or more selected from the group consisting of tris(2,4-di-tert-butylphenyl) phosphite, tris(nonylphenyl) phosphite (TNPP), and di-(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, more preferably tris(2,4-di-tert-butylphenyl) phosphite.
  • TNPP nonylphenyl
  • TNPP nonylphenyl phosphite
  • di-(2,4-di-tert-butylphenyl) pentaerythritol diphosphite more preferably tris(2,4-di-tert-butylphenyl) phosphite.
  • the UV stabilizer preferably includes one or more selected from the group consisting of a benzotriazole-based UV stabilizer and a HALS-based UV stabilizer, more preferably a mixture of a benzotriazole-based UV stabilizer and a HALS-based UV stabilizer.
  • the UV stabilizer preferably includes 0.1 to 2 parts by weight of a benzotriazole-based UV stabilizer and 0.1 to 2 parts by weight of a HALS-based UV stabilizer, more preferably 0.2 to 1 part by weight of a benzotriazole-based UV stabilizer and 0.2 to 1 part by weight of a HALS-based UV stabilizer, still more preferably 0.3 to 0.8 parts by weight of a benzotriazole-based UV stabilizer and 0.3 to 0.8 parts by weight of a HALS-based UV stabilizer.
  • a surface having a rough feeling may be implemented, and light resistance may be excellent.
  • the benzotriazole-based UV stabilizer may be a hydroxybenzotriazole-based compound, preferably a 2-(2′-hydroxyphenyl)benzotriazole-based compound, and more preferably includes one or more selected from the group consisting of 2-(2′-hydroxy-5′-methylphenyl)benzotriazole, 2-(3′,5′-di-tert-butyl-2′-hydroxyphenyl)benzotriazole, 2-(5′-tert-butyl-2′-hydroxyphenyl)benzotriazole, 2-(2′-hydroxy-5′-(1,1,3,3-tetramethylbutyl)phenyl)benzotriazole, 2-(3′,5′-di-tert-butyl-2′-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3′-tert-butyl-2′-hydroxy-5′-methylphenyl-5-chlorobenzotriazole), 2-(3′-sec-butyl
  • the HALS-based UV stabilizer preferably includes one Or more selected from the group consisting of 1,1-bis(2,2,6,6-tetramethyl-4-piperidyl)succinate, bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate, bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)-N-butyl-3,5-di-tert-butyl-4-hydroxybenzilmalonate, a condensation product of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, a linear Or cyclic condensation product of N,N′-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylene diamine and 4-tert-oc
  • the thermoplastic resin composition of the present invention may further include 0.01 to 5 parts by weight, 0.05 to 3 parts by weight, 0.1 to 2 parts by weight, or 0.5 to 1 part by weight of one or more selected from the group consisting of a heat stabilizer, a dye, a pigment (excluding inorganic pigments), a colorant, a release agent, an antistatic agent, an antibacterial agent, a processing aid, a metal deactivator, a flame retardant, a smoke suppressant, an anti-dripping agent, an anti-friction agent, and an anti-wear agent.
  • a heat stabilizer a dye, a pigment (excluding inorganic pigments), a colorant, a release agent, an antistatic agent, an antibacterial agent, a processing aid, a metal deactivator, a flame retardant, a smoke suppressant, an anti-dripping agent, an anti-friction agent, and an anti-wear agent.
  • thermoplastic resin composition of the present invention when extrusion RPM is changed from 20 to 60 under conditions of a barrel temperature of 190° C. and a die temperature of 200° C., the pressure gradient of the thermoplastic resin composition applied to a single screw extruder for sheet molding (type of die: T-die) is preferably 130 or less, more preferably 100 to 130, still more preferably 110 to 130. Within this range, since change in viscosity according to shearing is insignificant, processing stability may be excellent.
  • thermoplastic resin composition When the thermoplastic resin composition is discharged through a T-die having a single screw T-die extruder for 1 minute and 30 seconds under conditions of a barrel temperature of 190° C., a die temperature of 200° C., and an extrusion RPM of 50, a discharge rate calculated based on the discharge amount of the thermoplastic resin composition is preferably 18 g/min or more, more preferably 18 to 19.5 g/min, still more preferably 18 to 19.0 g/min. Within this range, processability and economics may be excellent.
  • the thermoplastic resin composition preferably has a capillary viscosity of 2,500 to 3,200 Pas, more preferably 2,600 to 3,100 Pas, still more preferably 2,700 to 3,000 Pas as measured at 190° C. in a shear range of 100/s. Within this range, processability and economics may be excellent.
  • the thermoplastic resin composition preferably has a storage modulus (geometry: 25 mm parallel plate) of 70,000 to 150,000 MPa, more preferably 80,000 to 140,000 MPa, still more preferably 90,000 to 130,000 MPa, as measured under conditions of a temperature of 190° C., a strain of 0.1%, and a frequency of 10 rad/s.
  • a storage modulus (geometry: 25 mm parallel plate) of 70,000 to 150,000 MPa, more preferably 80,000 to 140,000 MPa, still more preferably 90,000 to 130,000 MPa, as measured under conditions of a temperature of 190° C., a strain of 0.1%, and a frequency of 10 rad/s.
  • the thermoplastic resin composition preferably has a skewness Rsk (200° C.) of 0 to 0.5, more preferably 0 to 0.4, still more preferably 0 to 0.3, still more preferably 0.05 to 0.2, most preferably 0.08 to 0.15.
  • skewness Rsk 200° C.
  • weather resistance may be excellent without deterioration in mechanical properties and processability, and a product having a luxurious appearance, i.e., a rough feeling, without an artificial plastic feel may be provided.
  • the thermoplastic resin composition preferably has a skewness Rsk (220° C.) of 0.65 to 1.35, more preferably 0.7 to 1.2, still more preferably 0.7 to 1.3, still more preferably 0.7 to 1.0, most preferably 0.74 to 0.9.
  • skewness Rsk 220° C.
  • weather resistance may be excellent without deterioration in mechanical properties and processability, and a product having a luxurious appearance, i.e., a rough feeling, without an artificial plastic feel may be provided.
  • the thermoplastic resin composition preferably does not include a thermoplastic resin having a glass transition temperature of 125° C. or higher. More preferably, the thermoplastic resin composition does not include one or more selected from the group consisting of an alpha-methylstyrene-vinyl cyanide compound copolymer and a methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer. Still more preferably, the thermoplastic resin composition does not include both of an alpha-methylstyrene-vinyl cyanide compound copolymer and a methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer. In this case, low-temperature processability may not decrease at a temperature of less than 200° C.
  • glass transition temperature (Tg) may be measured by a measurement method commonly used in the art to which the present invention pertains to.
  • glass transition temperature (Tg) may be measured using a differential scanning calorimeter (DSC) according to ASTM D 3418.
  • a predetermined thermoplastic resin is not included means that the thermoplastic resin is not included at all, and also means that the thermoplastic resin is added in an amount that does not alter the effects of the thermoplastic resin composition of the present invention at all.
  • the amount of the thermoplastic resin may be less than 3% by weight, less than 2% by weight, less than 1% by weight, less than 0.5% by weight, or less than 0.1% by weight.
  • a heat resistant SAN resin such as alpha-methylstyrene-acrylonitrile copolymers
  • viscosity is high at low temperature, and change in viscosity is significant according to RPM.
  • the heat resistant SAN resin when added to the thermoplastic resin composition of the present invention, viscosity increases under low temperature processing conditions, thus deteriorating low-temperature processability and narrowing a processing window, thereby degrading processing stability. Accordingly, as described above, the heat resistant SAN resin is preferably excluded from the thermoplastic resin composition of the present invention.
  • thermoplastic resin composition is preferably a decking material. In this case, physical properties required for a decking material may be satisfied.
  • the thermoplastic resin composition preferably has a heat resistance of 80° C. or higher, more preferably 82° C. or higher, still more preferably 84° C. or higher, as a preferred example, 80 to 90° C., as a more preferred example, 82 to 90° C., as measured under a load of 18.6 kgf according to ASTM D648. Within this range, sufficient heat resistance may be secured, and low-temperature processability may be excellent at a temperature of less than 200° C.
  • the thermoplastic resin composition is preferably a matte thermoplastic resin composition having a film gloss of 15 or less as measured at 60° using a gloss meter VG7000. More preferably, the thermoplastic resin composition is a matte thermoplastic resin composition having a film gloss of 10 or less, still more preferably 8 or less. Within this range, matte properties and physical property balance may be excellent. Thus, the thermoplastic resin composition of the present invention may be referred to as a matte thermoplastic resin composition.
  • a method of preparing the thermoplastic resin composition of the present invention preferably includes extruding and kneading a thermoplastic resin composition at 220 to 280° C. using an extrusion kneader to prepare pellets, wherein the thermoplastic resin composition includes 10 to % by weight of a graft copolymer (A) including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 50 to 150 nm and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 300 to 600 nm; and 30 to 90% by weight of a non-grafted copolymer (B) including a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of 160,000 to 200,000 g/mol and a low
  • thermoplastic resin composition of the present invention compared to a conventional ASA resin, processability is excellent at a low temperature of less than 200° C., and thus no surface defects, such as flow marks or peeling, occur even during co-extrusion with a PVC resin. In addition, energy consumption is reduced. In addition, a PVC resin may be effectively covered using a small amount of an ASA resin, and thus economics is excellent. In addition, heat resistance is excellent.
  • the temperatures of the barrel part may be 50, 190, 190, and 190° C.
  • the temperatures of the die part may be 200, 200, and 200° C.
  • thermoplastic resin composition shares all the technical characteristics of the thermoplastic resin composition described above, and thus repeated description thereof will be omitted.
  • the step of preparing pellets using an extrusion kneader is preferably performed at 220 to 290° C., more preferably 250 to 290° C., still more preferably 270 to 290° C.
  • the temperature is the temperature of a cylinder.
  • Extrusion kneaders commonly used in the art to which the present invention pertains may be used without particular limitation, and a twin-screw extrusion kneader is preferably used.
  • a molded article of the present invention includes the thermoplastic resin composition of the present invention.
  • the thermoplastic resin composition of the present invention compared to a conventional ASA resin, processability is excellent at a low temperature of less than 200° C., and thus no surface defects, such as flow marks or peeling, occur even during co-extrusion with a PVC resin.
  • energy consumption is reduced.
  • a PVC resin may be effectively covered using a small amount of an ASA resin, and thus economics is excellent.
  • heat resistance is excellent.
  • the molded article is preferably an exterior material, more preferably a co-extrusion-molded article or an injection-molded article, still more preferably an article manufactured by co-extrusion with a PVC resin, as a specific example, a siding material, a decking material, a roofing material, a sliding door material, or a window material, as the most preferred example, a decking material.
  • the molded article may be manufactured by co-extruding the thermoplastic resin composition of the present invention at a molding temperature of less than 200° C., preferably a molding temperature of 180° C. or higher and less than 200° C., more preferably a molding temperature of 190 to 199° C. Within this range, no surface defects occur, and energy consumption is reduced, thereby improving economics.
  • the molded article may be manufactured by extruding or injecting the thermoplastic resin composition of the present invention at a molding temperature of 190 to 250° C., preferably 190 to 230° C., more preferably 190 to 220° C.
  • thermoplastic resin composition of the present invention the method of preparing the same, and the molded article including the same, other conditions or equipment that are not explicitly described may be appropriately selected without particular limitation within the range commonly practiced in the art.
  • A-1) Graft copolymer Butylacrylate-styrene-acrylonitrile copolymer (butylacrylate: 50% by weight, styrene: 35% by weight, and acrylonitrile: 15% by weight) containing acrylate rubber having an average particle diameter of 130 nm
  • A-2) Graft copolymer Butylacrylate-styrene-acrylonitrile copolymer (butylacrylate: 50% by weight, styrene: 35% by weight, and acrylonitrile: 15% by weight) containing acrylate rubber having an average particle diameter of 500 nm
  • pellets were used to prepare a sheet having a thickness of 0.15 T.
  • the sheet was prepared using a single screw T-die extruder under conditions of barrel temperatures of 50, 190, 190, and 190° C. and die temperatures of 200, 200, and 200° C.
  • the prepared sheet was used to measure gloss and surface roughness.
  • the prepared pellets were injected at a molding temperature of 220° C. to prepare a specimen for measuring physical properties. Then, the tensile strength and impact strength of the specimen were measured.
  • thermoplastic resin compositions (Examples 1 to 6) according to the present invention
  • due to excellent processability even at a low barrel temperature of less than 200° C. no surface defects, such as flow marks or peeling, occur.
  • energy consumption is reduced, and change in viscosity is insignificant according to change in extrusion RPM, thereby increasing processing stability.
  • heat resistance is excellent.
  • Comparative Examples 1 and 2 using a heat-resistant SAN resin instead of the SAN resin according to the present invention due to low discharge rate, processability is deteriorated and economics is reduced.
  • Comparative Examples 3 to 5 having a difference only in the type of the low molecular weight SAN resin heat resistance (HDT) is deteriorated.

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